CN103913516A - Method for detecting high-alloy steel by using ultrasonic instrument calibrated by general carbon steel test block - Google Patents
Method for detecting high-alloy steel by using ultrasonic instrument calibrated by general carbon steel test block Download PDFInfo
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- CN103913516A CN103913516A CN201410122114.3A CN201410122114A CN103913516A CN 103913516 A CN103913516 A CN 103913516A CN 201410122114 A CN201410122114 A CN 201410122114A CN 103913516 A CN103913516 A CN 103913516A
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Abstract
The invention discloses a method for detecting high-alloy steel by using an ultrasonic instrument calibrated by a general carbon steel test block. The method comprises the following steps: adjusting the time delay of a detection system and the leading edge of a probe on the CSK-IA test block by adopting a conventional method; adjusting the K value of the probe on the CSK-IA test block by adopting the conventional method; measuring the transversal wave sound velocity ct2 of a high-alloy steel workpiece; setting a K value parameter of the instrument; setting a transversal wave sound velocity parameter to be ct2; adding the sound energy transmission loss difference in the surface compensation of the instrument. The method is easy to operate and is used for calibrating the ultrasonic detection instrument in the absence of the corresponding test block during ultrasonic detection on the high-alloy steel, the required usage number of the ultrasonic calibration test blocks during field inspection can be reduced, and the detection cost can be lowered.
Description
Technical field
The present invention relates to a kind of method that detects high alloy steel grade with common straightcarbon steel test block calibration ultrasonic instrument.
Technical background
Ultrasound examination is a kind of important method of Non-Destructive Testing, in a lot of industries, is widely used.Before carrying out ultrasound examination, need supersonic reflectoscope to calibrate, to meet, reflecting body in workpiece is positioned to quantitative requirement.But a lot of employings of current ultrasound wave calibration block is common straightcarbon steel, corresponding longitudinal wave velocity is 5900m/s, and transverse wave velocity is 3230m/s.And for some high-alloy steel as for T/P91, T/P92 etc., while adopting common straightcarbon steel test block to calibrate as the common straightcarbon steel test block CSK-I A in JB/T4730-2005 standard, deviations is very large, and this is because the velocity of sound of these high-alloy steel is different from common straightcarbon steel.Need to after revising accordingly with the instrument partial parameters after common straightcarbon steel test block calibration, just can accurately position the reflecting body in high-alloy steel.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method that detects simply and easily high alloy steel grade with common straightcarbon steel test block calibration ultrasonic instrument, and it makes ultra-sonic defect detector after common straightcarbon steel test block calibration can be used for the detection of high-alloy steel.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of method that detects high alloy steel grade with carbon steel test block calibration ultrasonic instrument, and its gordian technique is: said method comprising the steps of:
1) instrument is set to shear wave detection, and transverse wave velocity is set as the transverse wave velocity ct1=3230m/s in common straightcarbon steel;
2) in CSK-I A test block, adjust according to a conventional method time delay and the Front distance of detection system;
3) in CSK-I A test block, adjusting the K value of popping one's head in is according to a conventional method K1;
4) transverse wave velocity of mensuration high-alloy steel workpiece is ct2;
5) the K value parameter of instrument is made as
6) be ct2 by the transverse wave velocity setting parameter of instrument;
7) make at the enterprising row distance of common straightcarbon steel test block-amplitude curve;
8) carry out the poor mensuration of acoustic energy loss according to detecting rules;
9) in the compensation of the surface of instrument, add acoustic energy loss poor.
The beneficial effect that adopts technique scheme to produce is: this method operation is succinct, for calibrate supersonic reflectoscope without corresponding test block in the situation that in the time of ultrasound examination high-alloy steel, it can reduce the making of ultrasound wave calibration block in field test, reduces testing cost.
Accompanying drawing explanation
Fig. 1 is snell law principle schematic.
Embodiment
Referring to accompanying drawing 1, the inventive method, take the common straightcarbon steel test block CSK-I A in JB/T4730-2005 standard as example, describes.
Reflecting body location when the velocity of sound has mainly affected ultrasound examination from two aspects, the one, sonic velocity change has affected the refraction angle of acoustic beam in workpiece, and there is variation in probe K value; That variation has occurred sound path in addition.Therefore, adjust after probe and instrument with common straightcarbon steel test block, need to revise K value and the velocity of sound.In the time that a branch of sound wave enters into another kind of waveguide from a kind of waveguide, acoustic beam reflects, and snell law is followed in refraction.
According to snell law:
Instrument adjustment comprises the following steps:
1) instrument is set to shear wave detection, and transverse wave velocity is set as the transverse wave velocity c in common straightcarbon steel
t1=3230m/s;
2) in CSK-I A test block, adjust according to a conventional method time delay and the Front distance of detection system;
3) in CSK-I A test block, adjusting the K value of popping one's head in is according to a conventional method K
1;
4) transverse wave velocity of mensuration high-alloy steel workpiece is c
t2;
5) the K value parameter of instrument is made as
6) be c by the transverse wave velocity setting parameter of instrument
t2;
7) make at the enterprising row distance of common straightcarbon steel test block-amplitude curve;
8) carry out the poor mensuration of acoustic energy loss according to detecting rules as (JB/T4730-2005);
In the compensation of the surface of instrument, add acoustic energy loss poor.
Claims (1)
1. a method that detects high alloy steel grade with carbon steel test block calibration ultrasonic instrument, is characterized in that: said method comprising the steps of:
1) instrument is set to shear wave detection, and transverse wave velocity is set as the transverse wave velocity c in common straightcarbon steel
t1=3230m/s;
2) in CSK-I A test block, adjust according to a conventional method time delay and the Front distance of detection system;
3) in CSK-I A test block, adjusting the K value of popping one's head in is according to a conventional method K
1;
4) transverse wave velocity of mensuration high-alloy steel workpiece is c
t2;
5) the K value parameter of instrument is made as
6) be c by the transverse wave velocity setting parameter of instrument
t2;
7) make at the enterprising row distance of common straightcarbon steel test block-amplitude curve;
8) carry out the poor mensuration of acoustic energy loss according to detecting rules;
9) in the compensation of the surface of instrument, add acoustic energy loss poor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410122114.3A CN103913516A (en) | 2014-03-29 | 2014-03-29 | Method for detecting high-alloy steel by using ultrasonic instrument calibrated by general carbon steel test block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410122114.3A CN103913516A (en) | 2014-03-29 | 2014-03-29 | Method for detecting high-alloy steel by using ultrasonic instrument calibrated by general carbon steel test block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103913516A true CN103913516A (en) | 2014-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410122114.3A Pending CN103913516A (en) | 2014-03-29 | 2014-03-29 | Method for detecting high-alloy steel by using ultrasonic instrument calibrated by general carbon steel test block |
Country Status (1)
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| CN (1) | CN103913516A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461922A (en) * | 2020-11-10 | 2021-03-09 | 西安热工研究院有限公司 | Ultrasonic detection system for wide temperature range |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4462082A (en) * | 1981-09-17 | 1984-07-24 | Rockwell International Corporation | Automatic calibration system for ultrasonic inspection |
| US5445029A (en) * | 1993-11-08 | 1995-08-29 | General Electric Co. | Calibration and flaw detection method for ultrasonic inspection of acoustically noisy materials |
| CN101650342A (en) * | 2009-09-05 | 2010-02-17 | 湖北新冶钢有限公司 | Calibration test block and method for ultrasonic detection of large-sized steel ferrule finished product |
| CN101806779A (en) * | 2010-04-30 | 2010-08-18 | 符丰 | Method for calibrating small-diameter probe for ultrasonic flaw detector |
| CN102353722A (en) * | 2011-06-24 | 2012-02-15 | 汪月银 | Rapid-setting method of parameters of flaw detector |
-
2014
- 2014-03-29 CN CN201410122114.3A patent/CN103913516A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4462082A (en) * | 1981-09-17 | 1984-07-24 | Rockwell International Corporation | Automatic calibration system for ultrasonic inspection |
| US5445029A (en) * | 1993-11-08 | 1995-08-29 | General Electric Co. | Calibration and flaw detection method for ultrasonic inspection of acoustically noisy materials |
| CN101650342A (en) * | 2009-09-05 | 2010-02-17 | 湖北新冶钢有限公司 | Calibration test block and method for ultrasonic detection of large-sized steel ferrule finished product |
| CN101806779A (en) * | 2010-04-30 | 2010-08-18 | 符丰 | Method for calibrating small-diameter probe for ultrasonic flaw detector |
| CN102353722A (en) * | 2011-06-24 | 2012-02-15 | 汪月银 | Rapid-setting method of parameters of flaw detector |
Non-Patent Citations (3)
| Title |
|---|
| 周建军: "便携式数字化超声波探伤仪的校准", 《设备管理与维修》 * |
| 张岩 等: "超声波检测中声速变化引起的定位误差分析", 《无损探伤》 * |
| 李广波 等: "浅谈声速的改变对超声波检测结果的影响", 《无损探伤》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461922A (en) * | 2020-11-10 | 2021-03-09 | 西安热工研究院有限公司 | Ultrasonic detection system for wide temperature range |
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Application publication date: 20140709 |